Iron is referred to in Critias 119e according to Bury’s translation

‘they hunted after the bulls with staves and nooses but with no weapon of iron; and whatsoever bull they captured they led up to the pillar and cut its throat over the top of the pillar, raining down blood on the inscription’.

If this reference was part of the original story told to Solon it adds further evidence that Plato’s description of Atlantis is that of a Late Bronze Age/Iron Age society. The context of this reference would appear to infer that the use of iron weapons was normal at that time. Elsewhere, the first mention of iron was around 1200 BC in the Middle East.